A new species of Odontella from Tierra del Fuego and notes on Afrodontella Deharveng, 1981 (Collembola: Odontellidae) Author Arbea, Javier I. C / Ría de Solía 3, ch. 39, 39610 El Astillero (Spain). jarbeapo @ gmail. com; https: // orcid. org / 0000 - 0001 - 6122 - 1331 Laboratorio de Ecología y Sistemática de Microartrópodos, Depto. Ecología y Recursos Naturales, Fac. Ciencias, UNAM, 04510, Ciudad de México, México. troglolaphysa @ hotmail. com; https: // orcid. org / 0000 - 0001 - 9097 - 6813 Author Palacios-Vargas, José G. text Zootaxa 2020 2020-07-03 4808 3 526 538 journal article 10.11646/zootaxa.4808.3.7 1175-5326 3933759 3A17D784-14CB-4DCB-AAF1-A03BFC17475D Afrodontella septemlobata ( Salmon, 1954 ) Figs 20–25 , Tables 3−4 Material examined : Kenya , near Massai Mara National Reserve , savanna, fissure in granite rock with moss and liverworts, 25−VIII−1996 , leg. B. & K. Kowalski , one female, AFR−96−3 slide in coll. Institute of Systematics and Evolution of Animals , Polish Academy of Sciences , Kraków ( Weiner & Najt 1998 ) . Description of specimens from Kenya . Female length 0.54 mm . Body integument strongly granulated. Antennae 0.9× head length. Ant. I, II and III with 5, 9−10 and 15 ordinary chaetae, respectively. AIIIO consist- ing of two small rounded internal sensory rods and two short guard sensilla, the external sensillum backward displaced; with ventral microsensillum present ( Fig. 23 ). Ant. IV dorso-distally with small ovoid organite and a short ms; six subcylindrical, bent, subequal sensilla (S2, S3, S4, S6, S7 and S8) and thinner S9 sensillum. Ant. IV apex with a domed swelling of integument. Apical exertile vesicle absent ( Fig. 25 ). With eversible sac between Ant. III and IV. Ocelli 5+5. PAO 1.8−1.9 longer than ocellus B, with 5−6 vesicles ( Fig. 23 ). Buccal cone rather short, with 2+2 postlabial subequal chaetae (m1 absent). Dorsal chaetotaxy as in Fig. 20 . Ordinary chaetae subequal, short, smooth and pointed. Formula of s-chaetae per half tergum: 0,2,2/1,1,1,1,1; position from Th. II to Abd. V: m6+p4,m6+p4/p5,p5,p5,p5,p3). Ms present on Th. II and III. Head without chaeta a0 and with chaetae sd2 and c3. Th. I with 4+4 chaetae; Th. II and III with 10+10 chaetae (m4 and m6(s) present). Abd. I–III with 9+9 chaetae (p4 absent); Abd. IV with 12+12 chaetae (m3 and m5 chaetae present, m1 absent); Abd. V with 3+3 chaetae between s-chaetae (a1, p1−2). Anal spines absent. Ventral chaetotaxy. Th. I−III without chaetae. Ventral tube with 3+3 apical chaetae, without lateral chaetae. Abd. II with 4+4 chaetae; Abd. III with 5+5 chaetae. Furcula well developed with 6 chaetae on each dens; mucro reduced, unilobed, three times shorter than dens ( Fig. 24 ). Retinaculum with 3+3 teeth. Each anal valve with three hr-chaetae. Tibiotarsi I, II and III with 17, 17 and 16 chaetae (9+8, 9+8 and 9+7), two of which are blunt or slightly clavate tenent hairs; with chaetae M on all legs; tibiotarsus III lacking chaeta B6 ( Figs. 21, 22 ). Subcoxa 1, subcoxa 2, coxa, trochanter and femur with 1/2/2; 0/2/2; 2/4/5; 5/5/5; 10/10/10 chaetae on leg I, II and III, respectively. Teeth not seen on the claws. Empodial appendage reduced. TABLE 4. Dorsal chaetotaxy of Afrodontella septemlobata .

Head chaetotaxy
sd	d	oc	c	p
No. chaetae	4	4	3	1	4
Chaetae	sd2,3,4,5	d1,2,3,5	oc1,2,3 c3		p1,2,3,4
Tergite chaetotaxy
a	m	p	Chaetae	Sensory chaetae
Th I	-	4	-	m1,2,3,4	-
Th II-III	3	2+ms	5	a1,3,5	m4,6+ms	p1,2,4,5,6	m6, p4
Abd I-III	4	-	5	a1,3,4,6	p1,2,3,5,6	p5
Abd IV	5	2	5	a1,2,4,5,6	m3,6	p1,2,3,5,6	p5
Abd V	2	-	4	a1,4	p1,2,3,4	p3
Abd VI	2	-	2+1 a1,2		p1,2+p0	-

FIGURES 18–19 . Odontella rapoporti sp. nov. , juvenile specimen: 18, dorsal chaetotaxy; 19, ventral chaetotaxy. Scale: 0.1 mm. FIGURES 20–25 . Afrodontella septemlobata : 20, dorsal chaetotaxy; 21, tibiotarsus and claw III; 22, tibiotarsus and claw II; 23, PAO and ocelli; 24, dens and mucro; 25, antennal chaetotaxy. Scales: 0.1 mm (20), 0.02 mm (21–25). TABLE 5. Checklist of species assigned to the genus Odontella in Bellinger et al. (1996 -2020) and proposed affiliation. Diagnostic characters: ES—eversible sac between Ant. III and IV; M—mucro: bidentate (bi) or unidentate (un); D—number of dental chaetae; AS—anal spines; SF—ventral sensorial file on Ant. IV; LS—spine-like chaetae and spines on labium; DV—ventro-apical vesicle on dens. References: od—original description; 1— Deharveng (1981) ; 2— Greenslade & Deharveng (1984) ; 3— Bellinger et al. (1996 -2020); 4— Hasegawa & Tanaka (2013) . (*)—new affiliation.

ES	M	D	AS	SF	LS	DV	Distribution	References	Proposed affiliation to the genus / morphological species group
anomala ( Salmon, 1944 )	+	bi	6	−	+	−	−	New Zealand	od (as Clavontella ), 1, 3 ( Odontella )	Odontella loricata group
araucanensis ( Izarra, 1982 )	+	bi	6	−	+	−	−	Argentina	od ( Zealandella ), 3 ( Odontella )	Odontella loricata group (*)
caerulumbrosa ( Salmon, 1944 )	+	bi	6	−	+	−	−	New Zealand	od ( Clavontella ), 1, 3 ( Odontella )	Odontella loricata group
conspicuata ( Salmon, 1944 )	+	bi	6	−	+	−	−	New Zealand	od ( Clavontella ), 1, 3 ( Odontella )	Odontella loricata group
contrerasi Izarra, 1972	+	bi	6	−	+	−	−	Argentina	od, 1, 3 ( Odontella )	Odontella loricata group
denticulata Rapoport & Rubio, 1963	+	bi	7	−	+	−	−	Chile	od, 1, 3 ( Odontella )	Odontella loricata group
do Najt & Weiner, 1997	+	bi	6	−	+	−	−	New Caledonia	od, 3 ( Odontella )	Odontella loricata group (*)
forsteri ( Salmon, 1942 )	+	bi	3	−	+	−	−	New Zealand	od ( Pseudontella ), 1, 3 ( Odontella )	Odontella loricata group
kapii Christiansen & Bellinger, 1992	+	bi	6	−	+	−	−	Hawaii	od, 3 ( Odontella )	Odontella loricata group (*)
loricata Schäffer, 1897	+	bi	−	+	−	−	Chile	od, 1, 3 ( Odontella )	Odontella loricata group
novacaledonica Najt & Weiner, 1997	+	bi	6	−	+	−	−	New Caledonia	od, 3 ( Odontella )	Odontella loricata group (*)
sudamericana ( Izarra, 1972 )	+	bi	6	−	+	−	−	Argentina	od ( Zealandella ), 1, 3 ( Odontella )	Odontella loricata group
sylvatica Weiner & Najt, 1991	+	bi	6	−	+	−	−	South Africa	od, 3 ( Odontella )	Odontella loricata group (*)
emineodentata Salmon, 1944	+	bi	4−6	+	+	+	−	New Zealand	od, 1, 3 ( Odontella )	Odontella minutissima group
minutissima ( Salmon, 1941	+	bi	6	+	+	+	−	New Zealand	od, 1, 3 ( Odontella )	Odontella minutissima group
huapensis ( Cassagnau & Rapoport, 1962 )	+	bi	6	+	+	+	−	Argentina	od ( Clavontella ), 1, 3 ( Odontella )	Odontella minutissima group
lobata Najt & Rubio, 1978	+	un	5(6)	−	−	−	+	Falkland Islands	od, 1, 3 ( Odontella )	Odontella lobata group
setosa Deharveng, 1981	+	bi	(6)7	−	−	−	+	Subantarctic Islands	od, 1, 3 ( Odontella )	Odontella lobata group
rapoporti sp. nov.	+	un	5(4)	−	−	−	+	Tierra del Fuego	Odontella lobata group (*)

......continued on the next page TABLE 5. (Continued)

ES	M	D	AS	SF	LS	DV	Distribution	References	Proposed affiliation to the genus / morphological species group
incerta ( Schött, 1917 )	+	bi	?	?	?	?	?	Australia	od ( Pseudachorutes ), 2, 3 ( Odontella )	Odontella
uka Christiansen & Bellinger, 1992	+	bi	5	+	+	−	−	Hawaii	od ( Odontella ), 3 ( Superodontella )	Odontella
christianseni ( Massoud & Bellinger, 1963 )	−	bi	2	+	−	−	−	Jamaica	od, 3 ( Odontella ), 1 ( incertae sedis )	Superodontella (*)
distincta ( Peja, 1985 )	−	bi	5	+	−	−	Albania	od, 3 ( Odontella )	Superodontella (*)
japonica ( Kinoshita, 1932 )	−	bi	4	−	−	Japan	od, 3 ( Odontella ), 1 ( incertae sedis ), 4 ( Superodontella )	Superodontella
pacifica ( Kutyreva, 1983 )	−	bi	5	+	−	−	−	Russia	od, 3 ( Odontella )	Superodontella (*)
schajovskoyi ( Izarra, 1982 )	−	bi	5	+	−	−	−	Argentina	od, 3 ( Odontella )	Superodontella (*)
virgulata ( Yosii, 1966 )	−	bi	5	−	−	−	Nepal	od, 3 ( Odontella ), 1 (incertae sedis)	Superodontella (*)
yinae (Zhao, 1997 in Tamura & Zhao, 1997 )	−	bi	5	−	−	−	−	China	od, 3 ( Odontella )	Superodontella (*)
yunnanensis ( Tamura, 1997 in Tamura & Zhao, 1997 )	−	bi	5	+	+	−	−	China	od, 3 ( Odontella )	Superodontella (*)

Taxonomic note . Afrodontella differs from all known species of the Odontella lobata group by the structure of the PAO with separate vesicles and by the reduced chaetotaxy (see Table 3 ).